What's the Difference Between Benign and Malignant Brain Tumors? Benign brain tumors are noncancerous. Malignant primary brain tumors are cancers that originate in the brain, typically grow faster than benign tumors, and aggressively invade surrounding tissue. Although brain cancer rarely spreads to other organs, it can spread to other parts of the brain and central nervous system.
For the suborder of mammals, see Sloth. Phyllophaga is a very large genus (more than 260 species) of New World scarab beetles in the subfamily Melolonthinae. Common names for this genus and many other related genera in the subfamily Melolonthinae are May beetles, June bugs, and June beetles. They range in size from 12 to 35 mm (0.47 to 1.38 in) and are blackish or reddish-brown in colour, without prominent markings, and often rather hairy ventrally.
The June beetles tend to mature in June, and they are complete adults at that time. So it takes a complete year for them to emerge by spring time. The June bugs are nocturnal because they get attracted to the light, and their lifecycle lasts about three years. The first year of their life is spent underground.